abc news, washington. >>> is the debate showdown a make-or-break event for mitt romney? can president obama defend his record on the economy during his first term? that's the debate taking place this morning at 8:00 when republican new jersey governor chris christie faces off with white house senior advisor david pluff. don't miss "this week" coming up with stephanopoulos. >> critical mass events are continuing in 300 cities. as they push for rights of bicyclists. in fran a farewell bike ride begins at 1:00 this afternoon at 16th and valencia and going to ocean beach. friday's massive 20th anniversary ride through san francisco snarled city streets during the evening commute but there were no arrests. >> new this morning, seem san rafael leaders will consider the county's most strict anti-smoking ordinance to date. it would ban smoking at all apartments and condominiums, in addition to outdoor places like parks and patios. sidewalks would also be off-limits. however the our media partner reports a draft ordinance would allow smoking in those areas if someone is walking w